#643F77#643F77

#643F77 is a dark, moderate violet. Relative luminance 0.076; OKLCH L 43.5% C 0.098 H 313.3°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#643F77
RGB	rgb(100, 63, 119)
HSL	hsl(280, 31%, 36%)
HSV	hsv(280, 47%, 47%)
CMYK	cmyk(16%, 47.1%, 0%, 53.3%)
CIE-LAB	lab(33.13, 27.10, -25.81)
CIE-LCH	lch(33.13, 37.42, 316.40°)
OKLab	oklab(43.46% 0.0676 -0.0716)
OKLCH	oklch(43.46% 0.098 313.3)
XYZ	xyz(10.3623, 7.5965, 18.3696)
Luminance	0.0760 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F77 #52773F

analogous

#483F77 #643F77 #773F6E

triadic

#643F77 #77643F #3F7764

tetradic

#643F77 #77483F #52773F #3F6E77

square

#643F77 #77483F #52773F #3F6E77

split-complementary

#643F77 #6E773F #3F7748

monochromatic

#211527 #422A4F #643F77 #86549F #A279B8

Accessibility & contrast

On white

8.34

#643F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#643F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F77

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F77	#FFFFFF	#000000	##FFFFFF
##643F77	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#344C79

Deuteranopia (green-blind)

#3E4F75

Tritanopia (blue-blind)

#624755

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #643f77;
/* rgb */ color: rgb(100, 63, 119);
/* oklch */ color: oklch(43.5% 0.098 313.3);

Tailwind

colors: {
  custom: {
    50: '#91759e',
    500: '#643f77',
    950: '#000000',
  },
}

SCSS

$custom: #643f77;
$custom-light: #91759e;
$custom-dark: #000000;

JSON

{
  "hex": "#643f77",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 119
  },
  "hsl": {
    "h": 279.643,
    "s": 30.769,
    "l": 35.686
  },
  "oklch": {
    "l": 0.43461,
    "c": 0.09847,
    "h": 313.3
  },
  "luminance": 0.07596
}

Semantic roles & 50–950 ramp

primary

#643F77

secondary

#81A26F

accent

#C76183

background

#F9F7F9

surface

#F1EDF2

border

#CBC8CC

text

#0D080E

muted

#7E7B7E

Preview Lab

Preview with #643F77

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →